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Wed Jan 10, 2018 7:43 am

So my 71 bay project is coming along. It has a 911 flat 6 with 915 transmission fitted, air ride suspension and Porsche brakes but the one problem we have is that we can not run traditional cables for the hand brake so wanted to retrofit an electric handbrake like most modern cars have. I have found a few calipers with motors on them but need to find a control system.

Anyone got any ideas or experience?

Wed Jan 10, 2018 9:38 am

Shile its not an emergency brake....just a parking brake....have you thought about a "line lock"?
Ray

Wed Jan 10, 2018 2:27 pm

those systems are CAN and LIN bus controlled, unless you bypass it somehow. also tied into the ABS etc etc

I am using brembo's on a chevelle build now

http://www.brembo.com/en/company/news/brembo-electric-parking-brake

Wed Jan 10, 2018 3:03 pm

raygreenwood wrote: Shile its not an emergency brake....just a parking brake....have you thought about a "line lock"?
Ray

Line locks can leak. Had it happen on a 737 once. The aircraft rolled in the hangar and fortunately someone was nearby and threw some chocks down to stop it. Close call.

Wed Jan 10, 2018 5:28 pm

Citroen's always had parking brake on the front wheels. Might make cable routing easier for you?

Wed Jan 10, 2018 7:14 pm

aeromech wrote: raygreenwood wrote: Shile its not an emergency brake....just a parking brake....have you thought about a "line lock"?
Ray

Line locks can leak. Had it happen on a 737 once. The aircraft rolled in the hangar and fortunately someone was nearby and threw some chocks down to stop it. Close call.

Happened on Lufthansa I think. Pilot wrote , " Bad taxi, almost Uber" into log

Wed Jan 10, 2018 7:34 pm

aeromech wrote: raygreenwood wrote: Shile its not an emergency brake....just a parking brake....have you thought about a "line lock"?
Ray

Line locks can leak. Had it happen on a 737 once. The aircraft rolled in the hangar and fortunately someone was nearby and threw some chocks down to stop it. Close call.

Yep....that exact fear is why I have never used one.

I have actually seen a set up long ago on a full custom off road vehicle that used a second set of small motorcycle calipers for the parking and emergency brake. It was powered with a single circuit MC that was operated from a pushrod on the tail end of the hand brake lever.

It was ingenious. I could never figure out whether the owner did this simply because he had parts laying around and it was easy...or if there was no other way he could figure it out.

This was back in the 80's when there were a lot less cars laying around in junkyards with GOOD designs of twin piston calipers...with parking brake. The sliding single piston caliper has come a long way...greatly improved.

Ray

Wed Jan 10, 2018 11:00 pm

Interesting project you have.

Have you seen this kit already?

https://www.amazon.com/Stopp-Button-Electric-Emergency-Billet/dp/B00QL3JKKQ

Thu Jan 11, 2018 5:58 am

ivwshane wrote: Interesting project you have.

Have you seen this kit already?

https://www.amazon.com/Stopp-Button-Electric-Emergency-Billet/dp/B00QL3JKKQ

Interesting! So its a solenoid driven cable pull. I wonder how or if it modulates...meaning can it just pull to lock or can you actually use it like an emergency brake during a total hydraulic failure....and apply partially to slow down. Ray

Thu Jan 11, 2018 6:09 am

dpetteng wrote: So my 71 bay project is coming along. It has a 911 flat 6 with 915 transmission fitted, air ride suspension and Porsche brakes

Photos please!! :D

Thu Jan 11, 2018 9:42 pm

raygreenwood wrote: ivwshane wrote: Interesting project you have.

Have you seen this kit already?

https://www.amazon.com/Stopp-Button-Electric-Emergency-Billet/dp/B00QL3JKKQ

Interesting! So its a solenoid driven cable pull. I wonder how or if it modulates...meaning can it just pull to lock or can you actually use it like an emergency brake during a total hydraulic failure....and apply partially to slow down. Ray

You've got me. Before this thread I didn't even know electronic brakes existed:o

Thu Jan 11, 2018 10:29 pm

raygreenwood wrote: Interesting! So its a solenoid driven cable pull.
I can't speak to the E-Stopp product, but the electric parking brakes I've seen for mobility vans use a linear actuator to pull the cables. My old high school algebra teacher has one on his Econoline van, along with hand controls and a wheelchair lift.

Fri Jan 12, 2018 12:24 am

So, in the UK, line locks are not legal for our MOT test (annual vehicle test). The rules for an MOT say it needs to be fully independent of the main braking system.

The problem is running cables from the cab via the big Bay pull handle so my thoughts are make it as simple "looking" as possible and run electronically. I first looked at the big cable actuator above but again, this takes lots of space where I don't have it.

This has brought me to using the calipers with integral motors of which there are a few choices but I need a way to control them as my engine ECU does not have a control function for this.

What would you like pictures of?

Sat Jan 13, 2018 2:27 pm

So does anyone know anything about control systems for electric handbrakes?

Sat Jan 13, 2018 7:47 pm

I had thought that maybe a electric trailer brake controller could be adapted to your system, they use power to apply the brake,which would not be a problem for emergency stopping,but would drain your battery if used as a park brake.
We want pictures of everything ,your bus,your engine install ,transmission,brakes, we love pictures.

Sun Jan 14, 2018 11:46 am

So, as a background, the van is my 1971 UK Bay camper. It had a minor restoration 14 years ago and we used it for 10 years for camping etc. Four years ago I got it to my restorer as we were moving to the states for a couple of years. Over the next two years it was worked on between other jobs, first on the list was to replace the hacked about roof with a sunroof version and add an engine hatch from another van (you will see why I need it later):

The biggest single job was finding a way to properly mount a 1985 911 flat 6 with 915 transmission AND fabricate a full front a rear air ride on a bay, quite a rare combination. I am not going to share too many pics as my restorer has done a lot of design work and wouldn't like it easily copied but we now have a 911 oil tank, engine and transmission mounted along with airbag air ride at the rear and a newly built front airbag beam from transporterhaus (custom made). In this time I have been collecting every exterior panel and have NOS versions for everything apart from the front panel which is a Gerson funky green panel. Still looking for a NOS left hand sliding door.

Mon Jan 15, 2018 8:22 am

Pictures locked up by photo bucket.
If you have an onboard air compressor for the air ride,could you use the air system to activate and release the park brake,a spring to put the brake on and air pressure to release it,much like a transport truck but on a smaller scale.

Mon Jan 15, 2018 2:16 pm

Another unusual thing we are using is the POrsche aircon compressor on the engine to fill the air tanks. The MOT test will not allow air brakes on cars in the UK, hence trying to figure the electrical solution!

Mon Jan 15, 2018 9:48 pm

Corona beer in the UK? Blasphemy I say!

Tue Jan 16, 2018 1:45 am

aeromech wrote: Corona beer in the UK? Blasphemy I say!

Not mine!